Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] power: supply: axp20x_ac_power: Annotate struct axp20x_ac_power with __counted_by | Date | Fri, 22 Sep 2023 10:53:55 -0700 |
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Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions).
As found with Coccinelle[1], add __counted_by for struct axp20x_ac_power.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Sebastian Reichel <sre@kernel.org> Cc: Chen-Yu Tsai <wens@csie.org> Cc: linux-pm@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/power/supply/axp20x_ac_power.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/power/supply/axp20x_ac_power.c b/drivers/power/supply/axp20x_ac_power.c index 19a118633115..e5733cb9e19e 100644 --- a/drivers/power/supply/axp20x_ac_power.c +++ b/drivers/power/supply/axp20x_ac_power.c @@ -45,7 +45,7 @@ struct axp20x_ac_power { struct iio_channel *acin_i; bool has_acin_path_sel; unsigned int num_irqs; - unsigned int irqs[]; + unsigned int irqs[] __counted_by(num_irqs); }; static irqreturn_t axp20x_ac_power_irq(int irq, void *devid) -- 2.34.1
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